An intraoral scanner orthodontics workflow is judged by four outputs, not by how smooth the scan looks on screen. You need a complete arch with no holes at the gingival margin, a buccal corridor that shows where the teeth sit relative to the face, a bite registration the planning software accepts without complaint, and a file the aligner planner can open and treat without repair. If any one of those is missing, the case comes back as a question rather than a plan.
What an intraoral scanner orthodontics workflow must deliver
Orthodontic planning software works on measurements, and measurements fail quietly. A 0.2 mm error at the contact point becomes a misjudged interproximal reduction value. A stretched gingival margin becomes an attachment placed on the wrong part of the crown. None of these problems announce themselves during capture, which is why the workflow has to be defined by acceptance criteria rather than by the operator's impression of the screen.
| Deliverable | Why the planner needs it | How to confirm it before the patient leaves |
|---|---|---|
| Full arch, both arches | Arch form, crowding and spacing measurement | Rotate the model 360 degrees and inspect the lingual of the lower incisors |
| Gingival margin on facial and lingual | Attachment placement and emergence profile | Cross-section through each quadrant at the margin |
| Bilateral bite registration | Occlusal relationship and midline | Check both buccal segments show contact, not just the right side |
| Buccal corridor capture | Smile line and facial reference for staging | Confirm the vestibule and a strip of mucosa are visible |
| Open export, correct scale | Import into third-party planning software | Measure one known tooth width after import |
Scan sequence: arches, buccal corridor and bite
Capture the upper arch first, then the lower, then the bite, then the buccal corridor. That order keeps the patient's mouth open for the shortest possible time in the segment where the scanner needs the most access, and it keeps the bite registration from being disturbed by a second round of retraction.
Start on the occlusal surface and roll to the facial, then sweep the palatal or lingual; at 198 g the AI-30 holds that path at 30 frames per second. Working occlusal-first gives the software a stable reference plane, and it reduces the chance that the wand loses tracking in the vestibule where there is little geometry to lock onto. For a full upper arch with a shallow palate, angle the wand so the tip stays clear of the rugae; dragging across the palate produces the smeared, low-confidence patches that force a rescan later.
The buccal corridor is the step most clinics skip. It is not needed for every aligner case, but it is needed whenever the plan depends on the smile line, the display of the gingival zenith, or a facial reference for staging. Capture it as a separate pass with the cheek retracted, and keep it as a separate scan set so the planner can choose whether to use it. Mixing corridor geometry into the arch scan makes the model harder to work with, not easier. Keeping it separate also produces cleaner digital orthodontic models for case presentation, which is why clinics choosing an intraoral scanner for orthodontics tend to judge it on that second pass as much as on the arch.
Step-by-step: a repeatable aligner scan workflow
A repeatable sequence matters more in orthodontics than in restorative work, because the same patient returns every six to ten weeks and the new scan has to be comparable with the last one. Use the same order every time and the comparison becomes trivial.
- Record the reason for the scan and the stage number in the patient file, so a later scan can be matched to the right stage.
- Dry the dentition. Saliva on the occlusal surfaces is the most common cause of a hole in the scan; a gauze square and two seconds of air are enough.
- Scan the upper arch occlusal-first, then facial, then palatal, finishing at the distal of the second molar.
- Scan the lower arch in the same pattern, paying attention to the lingual of the anterior teeth where crowding hides the margin.
- Register the bite in the right buccal segment, then the left. Confirm the software reports both.
- Capture the buccal corridor as a separate pass if the case needs a facial reference.
- Inspect the model in cross-section at every margin, then close any hole manually rather than accepting an automatic patch.
- Export in an open format, name the file with patient ID and stage, and check the scale once.
Where orthodontic scans fail: a checklist of common mistakes
Most failed orthodontic scans fall into a small number of categories, and all of them are visible before the patient leaves the chair. Run this checklist on every case for the first month, then keep it for complex cases only.
- Distal of the second molar missing, usually because the wand was rotated out of the mouth too early.
- Gingival margin lost on the lingual of lower anteriors, where crowding and calculus both interfere.
- Bite registered on one side only, which lets the planner accept a rotated occlusal relationship.
- Automatic hole filling accepted without inspection, producing a smooth surface that hides a missing contact point.
- Scan taken with a partial denture or retainer in place and no note in the file.
- Scale mismatch after export, caused by importing in the wrong unit.
The rescan decision is the one operators get wrong most often. Rescan if the margin is missing on a tooth that will carry an attachment, if the bite is registered on one side only, or if a hole crosses a contact point. Do not rescan for a small patch on the palatal rugae or on an edentulous saddle that no part of the plan depends on.
Choosing an intraoral scanner orthodontics setup for a growing practice
Orthodontic volume changes the hardware decision. A practice scanning ten aligner starts a week needs throughput and a workflow that a hygienist can run without supervision; a practice scanning two a week can prioritise portability and cost. Both need open export, because aligner planners and labs rarely use the same software as the scanner vendor, and a closed format turns a scanner into a subscription.
Check the export formats before anything else. STL, PLY and OBJ cover the planning packages in common use, and an open STL export is what lets a lab accept your scan without asking for a native file. Then check the tip range: a mini tip is not a paediatric gimmick, it is what makes a mixed dentition case comfortable enough to capture in one pass.
The orthodontic scanning configuration and the wider intraoral scanner range cover both ends of that decision, from a single-chair practice to a group with several sites. If you want the workflow reviewed against your own case mix, talk to our team and we will map your current scan sequence against the acceptance criteria above.
What to hand over to the aligner planner
Send the arches, the bite, the buccal corridor if it was captured, the stage number and a one-line note on what changed since the last scan. Name files by patient identifier, arch, stage and date, and confirm one test case imports at the correct scale before sending a batch. Keeping the scan set inside the software that produced it, such as the AIDENT Scan for Clinics case record, means a rejected plan can be traced to a specific capture rather than to a guess.
Frequently asked questions
Do I need to scan the palate for aligner cases?
For a full upper arch, yes, because the palate provides the reference geometry that keeps the arch from distorting during stitching. A partial palate capture is acceptable for a limited treatment plan, but the planner may ask for a full arch before staging. Scan the palate fully on the first visit and you will not be asked twice.
How do I know a scan is good enough before the patient leaves?
Cross-section every margin, check both buccal segments for bite contact, and inspect the distal of each second molar. If those three checks pass, the scan will plan. If any one fails, rescan that segment now rather than rebuilding the case from a support email two days later.
Can I use the same scan for a retainer after aligner treatment?
Only if the final scan was taken after the last aligner was removed and the teeth had settled. A scan taken with an aligner in place captures the aligner surface, not the tooth surface. Take a fresh scan at the retention visit and keep it as the retainer baseline.
What accuracy do I actually need for orthodontics?
Aligner planning tolerates more error than crown preparation, but not more than about 20 to 30 μm across the arch, because errors accumulate over the full dentition. A scanner rated at 10 μm full arch, such as the AI-30, leaves enough margin for handling and software error without pushing the plan outside tolerance.
If your orthodontic scan sequence still depends on the operator's judgement rather than a written checklist, start with the four acceptance criteria above and run them for twenty consecutive cases. Most practices find one recurring failure, and fixing it is usually a change to the order of capture rather than a change of scanner. To review a configuration for your case mix, see the orthodontic workflow pages or ask for a quote with your weekly aligner volume and current scan sequence.
